Gel cosmetic compositions

ABSTRACT

A single phase aqueous gel composition comprising 0.0-50% of a polysaccharide gellant, and 1-30% of an antiperspirant active ingredient solubilized in the aqueous single phase. 
     A water and oil emulsion comprising a gelled aqueous phase comprising a polysaccharide gellant and an antiperspirant active ingredient solubilized in the aqueous single phase; and an oil phase, 
     A method for preparing an emulsion antiperspirant or deodorant composition comprising preparing a first aqueous solution of antiperspirant or deodorant active, preparing a second aqueous solution of polysaccharide gellant, emulsifying the second aqueous solution in an oily phase to form an emulsion, combining the first aqueous solution and the emulsion so that the first and second aqueous solutions form a single homogeneous phase in the emulsion; and pouring the mixture into containers.

RELATED APPLICATIONS

This application is a divisional of U.S. Pat. application Ser. No.09/215,781 , filed Dec. 18, 1998 now U.S. Pat. No. 6,033,651 whichclaims the of provisional patent application serial No. 60/088,713,filed Jun. 10, 1998.

TECHNICAL FIELD

The invention is the field of solid opaque or clear gel cosmeticcompositions which may be in the stick or soft-solid form.

BACKGROUND OF THE INVENTION

Antiperspirants and deodorants are sold in various forms such as gels,solids, roll-ons, and aerosols. Gels are currently popular, since theyoften are perceived by consumers to have certain advantageous propertiessuch as smooth application and cool, comfortable feel when applied toskin. In addition, when the gels are clear, they are perceived to becleaner and less apt to stain clothing.

Antiperspirants and deodorants in the gel form are well known in theart. Typically, these gels are in the oil in water emulsion form andcontain water and a gellant in addition to other ingredients such asemulsifiers and emollients. Commonly used gellants are dibenzylidenealditols. For example U.S. Pat. No. 4,518,582 teaches acid stablemonosorbitol gels which contain a mixture of solvents, dibenzylidenemonosorbitol acetal as a gellant, C₁₂₋₂₀ fatty acids, and a gelstabilizer which is a mixture of magnesium sulfate, zinc acetate, andhexamethylene triamine.

Sodium stearate is also a well known gellant, and is often used indeodorant. For example, PCT WO 97/14398 teaches soap based, clear gelantiperspirant compositions containing 2 methyl 1,3-propanediol.However, sodium stearate tends to react with antiperspirant salts so itis difficult to make sodium stearate based antiperspirant gelcompositions.

U.S. Pat. No, 5,587,153 teaches clear gel water in oil emulsionantiperspirant compositions based upon water in silicone emulsions.However, these gels show problems with stability and syneresis.

Agarose and certain other polysaccharides such as gellan gum,carageenans, and the like, are well known gellants and are readilyavailable. However, polysaccharides in general are very unstable in thepresence of antiperspirant salts and quickly lose their gellingcapabilities when exposed to such salts. Further, including otheringredients in the gel composition to enhance the commercial propertiesof the gel causes even further instablity, which results in syneresisand other problems which make such products commercially unacceptable.

WO 95/31967 teaches that polysaccharides such carageenans or gellan gumcan be used to make antiperspirant gels if the polysaccharide gel iskept removed from the aqueous antiperspirant salt solution via formationof a triple emulsion. In particular, the aqueous antiperspirant saltsolution is dispersed in an oil phase. This water in oil emulsion isthen dispersed in a gelled aqueous outer phase, which isolates theantiperspirant salt from the gelled phase. This process isdisadvantageous because of the preparation of the triple emulsion istricky and time consuming. In addition, the emulsion itself may not beas stable as desired.

There is a need for an gel composition made from polysaccharides whichis stable in the presence of antiperspirant salts, i.e. does notprecipitate or exhibit unacceptable levels of syneresis.

An object of the invention is to formulate a single phase gelcomposition containing polysaccharide gellants.

An object of the invention is to formulate a single phase gelcomposition containing polysaccharide gellants, which is stable in thepresence of antiperspirant salts, i.e. the gel does not precipitate outof the composition and the composition does not exhibit unacceptablelevels of syneresis.

Another object of the invention is to prepare a clear or translucentsingle phase gel composition containing polysaccharides. Another objectof the invention is to prepare an opaque gel composition containingpolysaccharides.

Another object of the invention is to prepare a gel compositioncontaining polysaccharide gellants suitable for use as an antiperspirantor deodorant stick or soft solid.

Another object of the invention is to provide a method for making asolid gel antiperspirant/deodorant composition which is stable.

SUMMARY OF THE INVENTION

The invention comprises a single phase aqueous gel compositioncomprising, by weight of the total composition aqueous gel phasecomposition:

0.05-50% of a polysaccharide gellant, and

1-30% of an antiperspirant active ingredient solubilized in the aqueoussingle phase.

A water and oil emulsion solid composition comprising, by weight of thetotal water and oil emulsion solid composition:

1-85% of a single phase aqueous gel composition comprising apolysaccharide gellant and an antiperspirant active solubilized in thesingle phase, and

0.1-75% of an oily phase.

The invention comprises a method for making an antiperspirant/deodorantcomposition comprising the steps of:

(a) preparing a first aqueous solution of antiperspirant/deodorantactive,

(b) preparing a second aqueous solution of polysaccharide gellant,

(c) emulsifying the second aqueous solution in an oily phase to form anemulsion,

(d) combining the first aqueous solution and the emulsion wherein thefirst and second aqueous solutions form a single homogeneous phase inthe emulsion; and

(d) pouring the mixture into containers.

DETAILED DESCRIPTION The Single Aqueous Phase Gel Compositions

The gel compositions of the invention are characterized by being singlephase, which means that all of the ingredients in the composition,including the antiperspirant salt, exist in the same phase, i.e. the gelcomposition itself is not the emulsion form, or in the form of asuspension where the particulate antiperspirant salts or otheringredients are suspended or dispersed in the composition. In addition,the antiperspirant active ingredient is solubilized in the aqueoussingle phase composition as opposed to being found in the suspensoidform in the composition. However, if desired, the single phasecomposition of the invention can be emulsified or dispersed into an oilyphase to create a final composition in the form of a water-in-oilemulsion or oil-in-water emulsion where the water phase comprises thesingle phase gel composition, which forms either the continuous phase ordispersed phase of the emulsion.

The compositions contain the following ingredients, with all percentagesmentioned herein being percentages by weight unless otherwise indicated:

Polysaccharide Gellant

The compositions of the invention contain 0.05-50%, preferably 0.1-40%,more preferably 0.5-35% by weight of the total gel composition of apolysaccharide gellant. The term "polysaccharide gellant" means a watersoluble compound or composition (i) containing at least one saccharidemoiety; and (ii) which, upon mixing with water in a ratio of about 1 to1 at room temperature (25° C.) is capable of forming either a soft gelhaving a gel having a viscosity of about 1,000 to 800,000 centipoise at25° C., and/or a gel strength of about 10 to 5,000 grams/cm² at 25° C.as measured using a TA.XT2i texture analyzer with a 1/2 inch diametercylindrical probe. The term "saccharide moiety" means a polyhydroxyaldehyde or ketone, or acid hydrolysis product thereof, which,preferably, has the general formula C_(x) (H₂ O)_(y). Examples ofsaccharide moieties include the D and L forms of glucose, fructose,xylose, arabinose, fucose, galactose, pyruvic acid, succinic acid,acetic acid, galactose, 3,6-anhydro-galactose sulfate,galactose-4-sulfate, galactose-2-sulfate, galactose-2,6-disulfate,mannose, glucuronic acid, mannuronic acid, guluronic acid, galactouronicacid, rhamnose, and so on. Preferably the polysaccharide gellants have amolecular weight ranging from about 500 to 15,000,000 daltons,preferably 5,000 to 1,000,000, more preferably 25,000 to 500,000daltons. Polysaccharide gellants which fulfill the above criteriainclude polysaccharides such as galactans, galactomannans, glucomannans,polyuronic acids, and the like. Suitable galactans are agar, agarose,and kappa carageenan, iota carageenan, lambda carageenan. Examples ofsuitable galactomannans are locust bean gum and guar; examples ofglucans are cellulose and derivatives thereof, starch and derivatives,dextrans, pullulan, beta 1,3-glucans, chitin, xanthan, tamarind and thelike; examples of glucomannans are konjac; examples of polyuronic acidsare algin, alginates, pectins; examples of heteropolysaccharides aregellan, welan, gum arabic, karaya gum, okra gum, aloe gum, gumtragacanth, gum ghatti quinceseed gum, psyllium, starch arabinogalactanand so on.

Preferred are galactans, in particular agarose, which is apolysaccharide comprised of basic repeating units of 1,3-linkedbeta-D-galactopyranose and 1,4-linked3,6-anhydro-alpha-L-galactopyranose saccharide moieties. The agarose maybe substituted by hydrophobic or hydrophilic groups. Examples ofhydrophobic groups are alkoxy, in particular, methoxy. Examples ofhydrophilic or polar groups are sulfate, pyruvate and the like. Examplesof such substitutions are taught in Aoki, T. T.; Araki & M. Kitamikado;1990, Vibrio sp. AP-2. Eur. J. Biochem, 187, 461-465, which is herebyincorporated by reference. The average molecular weight of agaroseranges between 35,700 and 144,000 daltons. The agarose suitable for usein the compositions of the invention may be from any suitable source orlocale. For example an article authored by M. Lahaye and C. Rochas,Hydrobiologia, 221, 137-148, 1991, which is hereby incorporated byreference, discusses the numerous different types of agarose fromdifferent origins of seaweed species, all of which are suitable for usein the compositions of the invention. Also suitable for use in thecompositions of the invention are chemically modified agaroses, such asthose taught in an article authored by K. B. Guiseley in IndustrialPolysaccharides:Genetic Engineering, Structure/Property Relations andApplications, Edited by M. Yalpani, 1987, Elsevier Science Publishers,which is hereby incorporated by reference. The Guiseley article teachesmethods for the chemical modification of agaroses to obtain optimumgelling properties. One example of modified agarose is a hydroethylatedagarose which is sold under the brand names SeaPlaque and SeaPrep fromFMC, Inc. In general, any modification of agarose which does not affectthe helical conformation (i.e. which is obtained via linkage of the O6and O4 of galactose to the O2 of 3,6-anhydrogalactose) will preserve thegelling capability.

In the most preferred embodiment of the invention, the compositioncontains at least two polysaccharide gellants, preferably a galactan andone gellant which is a galactomannan, glucan, glucomannan, polyuronicacid, or heteropolysaccharide. Agarose suitable for use in thecompositions can be purchased from FMC Inc, under the tradenames SeakemLE and Seakem CLE.

Antiperspirant Active

The compositions of the invention contain 1-30%, preferably 5-25%, morepreferably 10-22% by weight of the total single phase aqueouscomposition of antiperspirant active salt.

The term "antiperspirant active salt" or "antiperspirant salt" means anycompound or composition having antiperspirant activity, preferablyastringent metallic salts such as the inorganic and organic salts ofaluminum, zirconium, and zinc, and mixtures thereof. Particularlypreferred are the aluminum and zirconium salts such as aluminum halides,aluminum hydroxide halides, zirconyl oxide halides, zirconyl hydroxyhalides, and mixtures thereof. Aluminum salts include those of theformula:

    Al.sub.2 (OH).sub.a Cl.sub.b.xH2O

wherein a is from about 2 to 5; a+b=6; x is from about 1 to about 6; andwherein a, b, and x may have non-integer values. Zirconium salts includethose of the formula:

    ZrO(OH).sub.2-a Cl.sub.a.xH.sub.2 O

wherein a is from about 1.5 to about 1.87; x is from about 1 to about 7;and wherein a and n may have non-integer values.

Examples of aluminum and zirconium salts include aluminum chloride,aluminum chlorohydrate, aluminum chlorohydrex PEG, aluminum chlorohydrexPG, aluminum dichlorohydrate, aluminum dichlorohydrex PEG, aluminumdichlorohydrex PG, aluminum sesquichlorohydrate, aluminumsesquichlorohydrex PEG, aluminum sesquichlorohydrex PG, aluminumzirconium octachlorohdrate, aluminum zirconium octachloroydrex GLY,aluminum zirconium pentachlorohydrate, aluminum zirconiumpentachlorohydrex GLY, aluminum zirconium tetrachlorohydrate, aluminumzirconium tetrachlorohydrex GLY, aluminum zirconium trichlorohydrate,aluminum zirconium triclilorohydrex GLY, and mixtures thereof

Particularly preferred zirconium salts are those complexes alsocontaining aluminum and glycine, in particular, aluminum zirconiumtetrachlorohydrex GLY. The antiperspirant salts used in the compositionof the invention are solubilized in the water. While preferably theantiperspirant salts are completely dissolved in the water, in somecases small amounts of salts may not be dissolved, i.e. may remain inthe crystalline or suspensoid form.

Water

The single phase aqueous composition of the invention also containswater. Preferably the composition contains 1-90%, more preferably 3-80%,most preferably 5-60% water.

In one preferred embodiment of the invention the composition is clear ortranslucent, which means that the composition has a refractive indexranging from about 1.0 to 1.6, preferably 1.2 to 1.5 at 21° C. and anoptical clarity of less than about 50 Nephelometric turbidity units(NTU) when measured with an Orbeco-Hellige #965 direct readingturbidometer, and a gel strength of 500 to 5000 grams/cm².

Other Ingredients

The single phase aqueous compositions of the invention may contain otheringredients which enhance the beneficial properties.

Gel Structure Modifiers

Preferably, the single phase aqueous composition contains 1-50%,preferably 2-40%, more preferably 5-35% of at least on gel structuremodifier. The term "gel structure modifier" means an ingredient which iscapable of modifying the gel structure in some fashion; for example byplasticizing the gel structure, improving texture or moisturizingproperties, which provide the end result of improving payoff; formed bythe aqueous polysaccharide gel such that it exhibits improved pay offwhen applied to the skin. For example, antiperspirant stick or gelcompositions, when applied to the skin, must deposit a certain amount ofproduct onto the skin. The amount of material deposited onto the skin asthe gel is rubbed across the skin surface is called "pay off". If a geldoes not have adequate pay off, when the gel is rubbed across theunderarm skin, a sufficient amount of the gel composition will not ruboff onto the skin. On the other hand, if the gel has too much pay off,when it is rubbed across the underarm skin too much of the gel depositson the skin. Thus, it is important to regulate the gel structure andconsistency so that pay off is optimal. Generally, suitable gelstructure modifiers include polyols, aliphatic short chain mono-, di,and polyhydric alcohols, ethoxylated and/or propoxylated fatty alcoholsor glycols, monomer and polymeric ethers and block copolymers, and thelike.

1. Polyols

Suitable polyols are defined as compounds which contain three or morehydroxyl groups per molecule. Examples of suitable polyols includefructose, glucamine, glucose, glucose glutamate, glucuronic acid,glycerin, 1,2,6-hexanetriol, hydroxystearyl methylglucamine, inositol,lactose, malitol, mannitol, methyl gluceth-10, methyl gluceth-20, methylglucose dioleate, methyl glucose sesquicaprylate/sesquicaprate, methylglucose sesquicocoate, methyl glucose sesquiisostearate, methyl glucosesesquilaurate, methyl glucose sesquistearate, phytantriol, riboflavin,sorbeth-6, sorbeth-20, sorbeth-30, sorbeth-40, sorbitol, sucrose,thioglycerin, xylitol, and mixtures thereof.

2. Ethers

Also suitable as gel structure modifiers are homopolymeric or blockcopolymeric liquid ethers. Polymeric ethers are preferably formed bypolymerization of monomeric alkylene oxides, generally ethylene orpropylene oxides. Preferred monomeric ethers are those exhibiting thestructure below were n=1. Preferred polymeric ethers are comprised ofmoieties having the general structure below wherein n=2 to 100: ##STR1##where R and R' are each independently H, or C₁₋₃₀ straight or branchedchain alkyl, and n is 1 to 20. Examples of such polymeric ethers includePEG, PPG, PEG/PPG copolymers, and derivatives thereof as well asalkoxylated alcohols such as steareth 2-100, ceteth 2-100, and the like.

Other examples of suitable polymeric ethers include polyoxypropylenepolyoxyethylene block copolymers having the general formula: ##STR2##wherein x is 1-200, y is 1-200. Such compounds are sold under CTFA nameMeroxapol 105, 108, 171, 172, 174, 178, 251, 252, 254, 255, 258, 311,312, and 314.

3. Alcohols

Mono-and dihydric alcohols are also suitable for use as gel structuremodifiers Generally, these mono- and dihydric alcohols have the generalformula R(OH)_(n), where n is 1 or 2 and R is a substituted orunsubstituted saturated C₂₋₁₀, preferably C₁₋₈ alkyl, or a substitutedor unsubstituted alicyclic, bicyclic, or aromatic ring, with thesubstituents selected from halogen, alkoxy, hydroxy, and so on. Examplesof suitable alcohols include monohydric alcohols such as ethanol,isopropanol, hexyldecanol, benzyl alcohol, propyl alcohol, and isopropylalcohol, as well as dihydric alcohols such as hexylene glycol,diethylene glycol, ethylene glycol, propylene glycol, 1,2-butyleneglycol, triethylene glycol, dipropylene glycol, methyl propanediol, andmixtures thereof.

4. Sorbitan Derivatives

Sorbitan derivatives, which are defined as ethers or esters of sorbitan,are also suitable gel structure modifiers. Examples of suitable sorbitanderivatives are the Polysorbates, which are defined as stearate estersof sorbitol and sorbitan anhydrides, such as Polysorbate 20, 21, 40, 60,61, 65, 80, 81, and 85. Also suitable are fatty esters of hexitolanhydrides derived from sorbitol, such as sorbitan trioleate, sorbitantristearate, sorbitan sesquistearate, sorbitan stearate, sorbitanpalmitate, sorbitan oleate, and mixtures thereof.

5. Organosiloxane Emulsifiers

Also suitable as gel structure modifiers are organosiloxane emulsifiers,provided they are at least partially soluble in the aqueous single phasecomposition. Suitable organosiloxane emulsifiers generally contain atleast one lipophilic radical or portion and at least one hydrophilicradical or portion so that a portion of the molecule is soluble in theaqueous phase composition and a portion of the molecule is dispersiblein the aqueous phase composition. The polymeric organosiloxane used inthe invention is preferably a liquid or semi-solid at 25° C. Thepolymeric organosiloxane is generally a water-in-oil or oil-in-watertype surfactant which is preferably nonionic, having anHydrophile/Lipophile Balance (HLB) of 2 to 18. Preferably theorganosiloxane is a nonionic surfactant having an HLB of 2 to 12,preferably 2 to 10, most preferably 4 to 6. The HLB of a nonionicsurfactant is the balance between the hydrophilic and lipophilicportions of the surfactant and is calculated according to the followingformula:

    HLB=7+11.7×log M.sub.w /M.sub.o

where M_(w) is the molecular weight of the hydrophilic group portion andM_(o) is the molecular weight of the lipophilic group portion.

The term "organosiloxane polymer" means a polymer containing a polymericbackbone including repeating siloxy units that may have cylic, linear orbranched repeating units, e.g. di(lower)alkylsiloxy units, preferablydimethylsiloxy units. The hydrophilic portion of the organosiloxane isgenerally achieved by substitution onto the polymeric backbone of aradical that confers hydrophilic properties to a portion of themolecule. The hydrophilic radical may be substituted on a terminus ofthe polymeric organosiloxane, or on any one or more repeating units ofthe polymer. In general, the repeating dimethylsiloxy units of modifiedpolydimethylsiloxane emulsifiers are lipophilic in nature due to themethyl groups, and confer lipophilicity to the molecule. In addition,longer chain alkyl radicals, hydroxy-polypropyleneoxy radicals, or othertypes of lipophilic radicals may be substituted onto the siloxy backboneto confer further lipophilicity and organocompatibility. If thelipophilic portion of the molecule is due in whole or part to a specificradical, this lipophilic radical may be substituted on a terminus of theorganosilicone polymer, or on any one or more repeating units of thepolymer. It should also be understood that the organosiloxane polymer inaccordance with the invention should have at least one hydrophilicportion and one lipophilic portion.

The term "hydrophilic radical" means a radical that, when substitutedonto the organosiloxane polymer backbone, confers hydrophilic propertiesto the substituted portion of the polymer. Examples of radicals thatwill confer hydrophilicity are hydroxy-polyethyleneoxy, hydroxyl,carboxylates, sulfonates, sulfates, phosphates, or amines.

The term "lipophilic radical" means an organic radical that, whensubstituted onto the organosiloxane polymer backbone, confers lipophilicproperties to the substituted portion of the polymer. Examples oforganic radicals which will conver lipophilicity are C₁₋₄₀ straight orbranched chain alkyl, fluoro, aryl, aryloxy, C₁₋₄₀ hydrocarbyl acyl,hydroxy-polypropyleneoxy, or mixtures thereof. The C₁₋₄₀ alkyl may benon-interrupted, or interruped by one or more oxygen atoms, a benzenering, amides, esters, or other functional groups.

The polymeric organosiloxane emulsifier used in the invention may haveany of the following general formulas:

    M.sub.x Q.sub.y,

or

    M.sub.x T.sub.y,

or

    MD.sub.x D'.sub.y D".sub.z M

wherein each M is independently a substituted or unsubstitutedtrimethylsiloxy endcap unit. If substituted, one or more of thehydrogens on the endcap methyl groups are substituted, or one or moremethyl groups are substituted with a substituent that is a lipophilicradical, a hydrophilic radical, or mixtures thereof. T is atrifinctional siloxy unit having the empirical formula RR'SiO₁.5 orRRSiO₁.5. Q is a quadrifunctional siloxy unit having the empiricalformula SiO₂, and D, D', D", x, y, and z are as set forth below, withthe proviso that the compound contains at least one hydrophilic radicaland at least one lipophilic radical. Examples of emulsifiers used in thecompositions of the invention are of the general formula:

    MD.sub.x D'.sub.y D".sub.z M

wherein the trimethylsiloxy endcap unit is unsubstituted ormono-substituted, wherein one methyl group is substituted with alipophilic radical or a hydrophilic radical. Examples of suchsubstituted trimethylsiloxy endcap units include (CH₃)₂ HPSiO, (CH₃)₂LPSiO, (CH₃)₂ CH₂ HPSiO, (CH₃)₂ CH₂ LPSiO, wherein HP is a hydrophilicradical and LP is a lipophilic radical. D, D', and D" are difunctionalsiloxy units substituted with methyl, hydrogen, a lipophilic radical, ahydrophilic radical or mixtures thereof. In this general formula:

x=0-5000, preferably 1-1000

y=0-5000, preferably 1-1000, and

z=0-5000, preferably 0-1000,

with the proviso that the compound contains at least one lipophilicradical and at least one hydrophilic radical. Examples of these polymersare disclosed in U.S. Pat. No. 4,698,178, which is hereby incorporatedby reference.

Particularly preferred is a linear silicone of the formula:

    MD.sub.x D'.sub.y D".sub.z M

wherein

M=RRRSiO_(1/2)

D and D'=RR'SiO_(2/2)

D"=RRSiO_(2/2)

x, y, and z are each independently 0-1000,

where R is methyl or hydrogen, and R' is a hydrophilic radical or alipophilic radical, with the proviso that the compound contains at leastone hydrophilic radical and at least one lipophilic radical.

Most preferred is wherein

M=trimethylsiloxy

D=Si[(CH₃)][(CH₂)_(n),CH₃ ]O_(2/2) where n=1-40,

D'=Si [(CH₃)][(CH₂)_(o) --O--PE)]O_(2/2) where PE is (--C₂ H₄ O)_(a)(--C₃ H₆ O)_(b) H, o=0-40;

a=1-100 and b=1-100, and

D"=Si(CH₃)₂ O_(2/2)

Typical examples of preferred organosiloxane emulsifiers in accordancewith the invention include those set forth below: ##STR3## wherein LP isa lipophilic radical HP is a hydrophilic radical

x is 0-5000

y is 0-5000, and

z is 0-5000, with the proviso that the organosiloxane contains at leaston hydrophilic radical and at least one lipophilic radical.

More preferred are compounds of the generic formula I wherein LP is alipophilic radical which is a C₁₋₄₀ straight or branched chain alkyl, HPis a hydrophilic radical containing hydroxy-polyethyleneoxy, and z is atleast 1. Most preferred is a compound of the formula: ##STR4## wherein pis 1-40, and

    PE is (--C.sub.2 H.sub.4 O).sub.a (--C.sub.3 H.sub.6 O).sub.b --H

where x, y, z, a, and b are such that the molecular weight of thepolymer ranges from about 500 to 100,000. Organosiloxane polymers usefulin the compositions of the invention are commercially available fromGoldschmidt Corporation under the ABIL tradename. The preferred polymeris cetyl dimethicone copolyol and has the tradename ABIL WE 09 or ABILWS 08.

Another type of preferred organosiloxane emulsifier suitable for use inthe compositions of the invention are emulsifiers sold by Union Carbideunder the Silwet™ trademark. These emulsifiers are represented by thefollowing generic formulas:

    (Me.sub.3 Si).sub.y-2 [(OSiMe.sub.2).sub.x/y O-PE].sub.y

wherein

PE=-(EO)_(m) (PO)_(n) R

R=lower alkyl or hydrogen

Me=methyl

EO is polyethyleneoxy

PO is polypropyleneoxy

m and n are each independently 1-5000

x and y are each independently 0-5000, and ##STR5## wherein PE=--CH₂ CH₂CH₂ O(EO)_(m) (PO)_(n) Z

Z=lower alkyl or hydrogen, and

Me, m, n, x, y, EO and PO are as described above,

with the proviso that the molecule contains a lipophilic portion and ahydrophilic portion. Again, the lipophilic portion can be supplied by asufficient number of methyl groups on the polymer backbone.

Particularly preferred is a Silwet™ polymer of the following generalformula: ##STR6## Wherein n is 1-10, preferably 8.

Another preferred organosiloxane emulsifier for use in the compositionsof the invention is dimethicone copolyol.

Examples of other polymeric organosiloxane surfactants or emulsifiersinclude amino/polyoxyalkyleneated polydiorganosiloxanes disclosed inU.S. Pat. No. 5,147,578. Also suitable are organosiloxanes sold byGoldschmidt under the ABIL trademark including ABIL B-9806, as well asthose sold by Rhone-Poulenc under the Alkasil tradename. Also,organosiloxane emulsifiers sold by Amerchol under the Amersil tradename,including Amersil ME-358, Amersil DMC-287 and Amersil DMC-357 aresuitable. Dow Corning surfactants such as Dow Corning 3225C FormulationAid, Dow Corning 190 Surfactant, Dow Corning 193 Surfactant, Dow CorningQ2-5200, and the like are also suitable. In addition, surfactants soldunder the tradename Silwet by Union Carbide, and surfactants sold byTroy Corporation under the Troysol tradename, those sold by TaiwanSurfactant Co. under the tradename Ablusoft, those sold by Hoechst underthe tradename Arkophob, are also suitable for use in the invention.

Preferred is where the gel structure modifier is selected from amonomeric ether, polymeric ether, monohydric alcohol, dihydric alcohol,organosiloxane emulsifier, polymeric ether, or mixtures thereof.Particularly preferred is wherein the monohydric alcohol is a C₂₋₁₀alkanol, preferably ethanol, and the dihydric alcohols are of theformula ROR' wherein each R and R' are independently H or a C₂₋₁₀unsubstituted or substituted alkyl, where the substituent is hydroxyl ormethyl; such compounds being preferably propylene glycol, dipropyleneglycol, and methyl propandiol.

Deodorant Actives

It may be desired to incorporate into the cosmetic gel composition oneor more deodorant actives. If so, a range of about 0.1-30% of deodorantactive is suggested. The deodorant actives should be soluble in theaqueous single phase composition, or water dispersible carrier, such astriclosan encapsulated in cyclodextrin, which may be purchased fromLipo, Inc. Examples of suitable deodorant actives include fragrances,ammonium phenolsulfonate, benzalkonium chloride, benzethonium chloride,bromochlorophene, cetylpyridinium chloride, chlorophyllin-coppercomplex, chlorothymol, chloroxylenol, cloflucarban, dequaliniumchloride, dichlorophene, dichloro-m-xylenol, disodium dihydroxyethylsulfosuccinylundecylenate, domiphen bromide, hexachlorophene, laurylpyridinium chloride, methylbenzethonium chloride, phenol, sodiumbicarbonate, sodium phenolsulfonate, triclocarbone, triclosan, zincphenolsulfonate, zinc ricinoleate, and mixtures thereof. The preferreddeodorant active is triclosan, fragrance and the like.

The composition of the invention may contain other ingredients,providing such ingredients are soluble in the aqueous single phasecomposition, or water dispersible/miscible via emulsification or adelivery system. Such ingredients may possibly include humectants,detackifiers such as dimethyl isosorbide, preservatives, surfactants,and so on.

In preparing the single aqueous phase composition, it may be desireableto prepare the composition by combining all ingredients together andmixing well, preferably with elevated temperature. It may also bedesired to prepare separate phases of the single aqueous phasecomposition as a pre-mix, and then combine the separate pre-mixestogether. For example, it is believed that the final compositionexhibits improved stability when the single aqueous phase is prepared astwo pre-mixes. The first pre-mix is an aqueous solution ofantiperspirant salt. The second pre-mix comprises water, and the desiredwater soluble ingredients as mentioned above. The first and secondpre-mix are then combined and mixed well to provide the single aqueousphase composition.

Water and Oil Emulsion Solid Compositions

As noted, the single phase aqueous gel composition of the invention maybe used alone, or it may be used to form an emulsion. In the lattercase, the gel composition may either be dispersed into an oily phase, orthe gel composition may form the continuous phase and the oily phase maybe dispersed into the gel composition. The oily phase should beinsoluble or immiscible with the aqueous gel phase. If the gelcomposition is used to form an emulsion, generally the emulsioncomposition will contain about 1-85%, preferably 5-70%, more preferably7-60% by weight of the total emulsion composition of the aqueous singlephase gel composition, and about 0.1-75%, preferably 0.5-65%, morepreferably 1-50% by weight of the total emulsion composition of oil.Preferably, the emulsions are oil in water emulsions.

Oils

The oils used may be volatile or nonvolatile. The term "volatile" meansthat the oil has a measureable vapor pressure, or a vapor pressure of atleast 2 mm. of mercury at 20° C. The term "nonvolatile" means that theoil has a vapor pressure of less than 2 mm. of mercury at 20° C.Suitable volatile solvents generally have a viscosity of 0.5 to 10centistokes at 250° C. Suitable volatile oils include linear silicones,cyclic silicones, paraffinic hydrocarbons, or mixtures thereof.

Cyclic silicones (or cyclomethicones) are of the general formula:##STR7## where n=3-7.

Linear volatile silicones in accordance with the invention have thegeneral formula:

    (CH.sub.3).sub.3 Si--O--[Si(CH.sub.3).sub.2 --O].sub.n --Si(CH.sub.3).sub.3

where n=0-7, preferably 0-5.

Linear and cyclic volatile silicones are available from variouscommercial sources including Dow Coming Corporation and GeneralElectric. The Dow Corning volatile silicones are sold under thetradenames Dow Coming 244, 245, 344, and 200 fluids. These fluidscomprise octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane,hexamethyldisiloxane, and mixtures thereof.

Also suitable as the volatile oils are various straight or branchedchain paraffinic hydrocarbons having 5 to 40 carbon atoms, morepreferably 8-20 carbon atoms. Suitable hydrocarbons include pentane,hexane, heptane, decane, dodecane, tetradecane, tridecane, and C₈₋₂₀isoparaffins as disclosed in U.S. Pat. Nos. 3,439,088 and 3,818,105,both of which are hereby incorporated by reference. Preferred volatileparaffinic hydrocarbons have a molecular weight of 70-225, preferably160 to 190 and a boiling point range of 30 to 320, preferably 60-260degrees C., and a viscosity of less than 10 cs. at 25 degrees C. Suchparaffinic ydrocarbons are available from EXXON under the ISOPARStrademark, and from the Permethyl Corporation. Suitable C₁₂ isoparaffinsare manufactured by Permethyl Corporation under the tradename Permethyl99A. Another C₁₂ isoparaffin (isododecane) is distributed by Presperseunder the tradename Permethyl 99A. Various C₁₆ isoparaffins commerciallyavailable, such as isohexadecane (having the tradename Permethyl R), arealso suitable. Transfer resistant cosmetic sticks of the invention willgenerally comprise a mixture of volatile silicones and volatileparaffinic hydrocarbons.

A wide variety of nonvolatile oils are also suitable for use in thecosmetic compositions of the invention. The nonvolatile oils generallyhave a viscosity of greater than 10 centipoise at 25° C., and may rangein viscosity up to 1,000,000 centipoise at 25° C. Examples ofnonvolatile oils suitable for use in the cosmetic sticks of theinvention include esters of the formula RCO--OR' wherein R and R' areeach independently a C₁₋₂₅, preferably a C₄₋₂₀ straight or branchedchain alkyl, alkenyl or alkoxycarbonylalkyl or alkylcarbonyloxyalkyl.Examples of such esters include isotridecyl isononanoate, PEG-4diheptanoate, isostearyl neopentanoate, tridecyl neopentanoate, cetyloctanoate, cetyl palmitate, cetyl ricinoleate, cetyl stearate, cetylmyristate, cocodicaprylate/caprate, decyl isostearate, isodecyl oleate,isodecyl neopentanoate, isohexyl neopentanoate, octyl palmitate, dioctylmalate, tridecyl octanoate, myristyl myristate, octododecanol, and fattyalcohols such as oleyl alcohol, isocetyl alcohol, and the like, as wellas the esters disclosed on pages 24-26 of the C.T.F.A. CosmeticIngredient Handbook, First Edition, 1988, which is hereby incorporatedby reference.

The oil may also comprise naturally occuring glyceryl esters of fattyacids, or triglycerides. Both vegetable and animal sources may be used.Examples of such oils include castor oil, lanolin oil, triisocetylcitrate, C₁₀₋₁₈ triglycerides, caprylic/capric/triglycerides, coconutoil, corn oil, cottonseed oil, linseed oil, mink oil, olive oil, palmoil, illipe butter, rapeseed oil, soybean oil, sunflower seed oil,walnut oil, and the like.

Also suitable as the oil are synthetic or semi-synthetic glycerylesters, e.g. fatty acid mono-, di-, and triglycerides which are naturalfats or oils that have been modified, for example, acetylated castoroil, glyceryl stearate, glyceryl dioleate, glyceryl distearate, glyceryltrioctanoate, glyceryl distearate, glyceryl linoleate, glycerylmyristate, glyceryl isostearate, PEG castor oils, PEG glyceryl oleates,PEG glyceryl stearates, PEG glyceryl tallowates, and so on.

Also suitable as the oil are nonvolatile hydrocarbons such asisoparaffins, hydrogenated polyisobutene, mineral oil, squalene,petrolatum, and so on.

Also suitable as the oil are various lanolin derivatives such asacetylated lanolin, acetylated lanolin alcohol, and so on.

Nonvolatile silicones, both water soluble and water insoluble, are alsosuitable as the oil component. Such silicones preferably have aviscosity of 10 to 600,000 centistokes, preferably 20 to 100,000centistokes at 25° C. Suitable water insoluble silicones includeatnodimethicone, bisphenylhexamethicone, dimethicone, hexadecylmethicone, methicone, phenyl trimethicone, simethicone,dimethylhydrogensiloxane, stearoxytrimethylsilane, vinyldimethicone, andmixtures thereof.

Also suitable as the nonvolatile oil are various fluorinated oils suchas fluorinated silicones, fluorinated esters, or perfluropolyethers.Particularly suitable are fluorosilicones such as trimethylsilylendcapped fluorosilicone oil, polytrifluoropropylmethylsiloxanes, andsimilar silicones such as those disclosed in U.S. Pat. No. 5,118,496which is hereby incorporated by reference. Perfluoropolyethers likethose disclosed in U.S. Pat. Nos. 5,183,589, 4,803,067, 5,183,588 all ofwhich are hereby incorporated by reference, which are commerciallyavailable from Montefluos under the trademark Fomblin, are also suitableshine enhancers.

Guerbet esters are also suitable oils. The term "guerbet ester" means anester which is formed by the reaction of a guerbet alcohol having thegeneral formula: ##STR8## with a carboxylic acid having the generalformula:

    R.sup.3 COOH,

or

    HOOC--R.sup.3 --COOH

wherein R¹ and R² are each independently a C₄₋₂₀ alkyl and R³ is asubstituted or unsubstituted fatty radical such as a C₁₋₅₀ straight orbranched chain saturated or unsaturated alkyl or alkylene, or phenyl,wherein the substituents are halogen, hydroxyl, carboxyl, andalkylcarbonylhydroxy. Particularly preferred is a carboxylic acidwherein the R group is such to provide an ingredient known as meadowfoamseed oil.

Preferably, the guerbet ester is a fluoro-guerbet ester which is formedby the reaction of a guerbet alcohol and carboxylic acid (as definedabove), and a fluoroalcohol having the following general formula:

    CF.sub.3 --(CF.sub.2).sub.n --CH.sub.2 --CH.sub.2 --OH

wherein n is from 3 to 40.

Examples of suitable fluoro guerbet esters are set forth in U.S. Pat.No. 5,488,121 which is hereby incorporated by reference. Suitablefluoro-guerbet esters are also set forth in U.S. Pat. No. 5,312,968which is hereby incorporated by reference. Most preferred is a guerbetester having the tentative CTFA name fluoro-octyldodecyl meadowfoamate.This ester is sold by Siltech, Norcross Georgia as Developmental EsterL61125A, under the tradename Silube GME-F.

Preferably, the compositions of the invention contain a mixture ofvolatile and nonvolatile silicone oils, so that the amount of volatileoil is about 1-10%, by weight of the total composition, and the amountof nonvolatile oil is about 1-10% by weight of the total emulsioncomposition. In the preferred embodiment of the invention, the preferredvolatile oil is cyclomethicone and the preferred nonvolatile oil is alow viscosity dimethicone. i.e dimethicone having a viscosity of about15-25 centipoise at 25° C.

Waxes

The oily phase of the emulsion may contain one or more materials thatare solid at room temperature such as fatty acids, fatty alcohols, andthe like. These materials act as gel structure modifiers for the oilyphase. Suggested ranges of oily phase gel structure modifiers are0.1-30%, preferably 0.5-25%, more preferably 1-20% by weight of thetotal emulsion composition. Suitable oily phase gel structure modifiersinclude straight or branched chain fatty alcohols having the formulaR--OH, wherein R is a straight or branched chain saturated orunsaturated alkyl having 6-30 carbon atoms. Such fatty alcohols includecetyl alcohol, stearyl alcohol, cetearyl alcohol, and the like. Alsosuitable are fatty acids having the formula R--COOH, wherein R is astraight or branched chain saturated or unsaturated alkyl having 6-30carbon atoms, which may be substituted with one or more hydroxyl groups.Preferred are fatty acids wherein R is straight or branched chain alkylhave 12-22 carbon atoms, which may be substituted with one or morehydroxyl groups. Particularly preferred is 12-hydroxystearic acid.

If the aqueous gel composition is combined with an oil phase to form anemulsion, the compositions prepared may be opaque, or clear ortranslucent. If clear, translucent compositions are desired, the oilsselected should not be hazy or cloudy in appearance. Clarity is thenachieved by matching the refractive indices of both phases such thatthey match within about 0.0001 to 0.0006.

An emulsion composition may be formed by preparing the single aqueousphase composition and emulsifying it into the oily phase. It may also bedesired to prepare the single aqueous phase in one or more pre-mixphases. One pre-mix is emulsified into the oily phase. The secondpre-mix is then emulsified into the emulsion to form a stable emulsionof the two combined pre-mixes which form a single aqueous phase, whichis emulsified into the oily phase, as further described below.

The Method

The invention comprises a method for making an antiperspirant ordeodorant composition comprising the steps of:

(a) preparing a first aqueous solution comprised of an antiperspirant ordeodorant active,

(b) preparing a second aqueous solution comprised of a polysaccharidegellant,

(c) emulsifying the second aqueous solution in an oily phase to form anemulsion,

(d) combining the first aqueous solution and the emulsion so that thefirst and second aqueous solutions form a single homogeneous phase inthe emulsion; and

(d) pouring the mixture into containers.

The first aqueous solution (or pre-mix) is prepared by mixing thedesired antiperspirant or deodorant active, preferably antiperspirantactive, with water until the active has dissolved in the water. If adeodorant active is used, the deodorant actives mentioned herein aresuitable, and in the ranges stated. The aqueous solution of active inwater may be prepared or purchased in the solution form. Generally, theaqueous active solution comprises about 10-85%, preferably 15-65% byweight of the total aquesolution of antipersporant active. Mostpreferred is an aqueous antiperspirant active solution containing about43% by weight of the total first aqueous solution of dissolvedantiperspirant salt. If desired, other water soluble ingredients may beincorporated into the first aqueous solution, such as those referred toas gel structure modifiers herein, and in the amounts set forth, aresuitable. Particularly suitable are silicone surfactants, polyols, andthe like. If so, suggested ranges of ingredients include 0.1-50% byweight of the total first aqueous solution of silicone surfactant issuggested, and 5-95% by weight of the total first aqueous solution ofpolyol is suggested. It may also be desired to include bases such asacetamide MEA or similar materials for pH adjustment.

The second aqueous solution (or pre-mix) is prepared by dissolving apolysaccharide gellant in water. Suitable polysaccharide gellants are asmentioned herein. Generally, the polysaccharide gellant comprises about1-50% by weight of the total second aqueous solution, and watercomprises about 50-99% by weight of the total second aqueous solution.If desired, other ingredients such as silicone surfactants, polyols, andother water soluble ingredients may be added to the second aqueoussolution. In general, the water soluble ingredients may be added toeither the first or second aqueous phase solution. Suitable ingredientsare those set forth under "Gel Structure Modifiers" as set forth herein,and in the ranges specified. Preferably, the other water solubleingredients are added to the second aqueous phase solution, and includesilicone surfactants, polyols, and certain bases, including acetamideMEA, which adjust the composition to the appriopriate pH. Preferably thesecond aqueous phase solution is prepared by heating the water and otherwater soluble ingredients to a temperature of about 100 to 105° C. Thepolysaccharide gellant is added to the water and mixed well until thegellant is dissolved and the solution is clear. The temperature is thenreduced slightly, to about 85-90° C.

Then, the second aqueous phase solution is emulsified into an oilyphase. Generally, the oily phase ingredients are pre-mixed. Suitableoily phase ingredients are as set forth herein, in the ranges given. Theoily phase ingredients are then mixed with the second aqueous phasesolution at slightly elevated temperature, preferably about 65 to 85° C.The second aqueous phase solution and oily phase are mixed well to forman emulsion.

Then the first aqueous solution is added to the emulsion formed whencombining the second aqueous solution and the oily phase. The first andsecond aqueous solutions become one single homogeneous phase in theemulsion. Preferably the single homogeneous phase formed by thecombination of first and second aqueous solutions is the continuousphase of the emulsion and the oily phase is the dispersed phase, thusproviding an oil-in-water emulsion. However, the emulsion formed may bea water-in-oil emulsion as well. Preferably, the first aqueous solutionis heated to a temperature of about 50 to 65° C. prior to mixing it withthe emulsion. It is preferable that the emulsion be maintained at atemperature of 50 to 75° C., preferably 60 to 75° C. when mixing withthe first aqueous solution. Generally about 20-80 parts of the emulsionare mixed with about 20 to 80 parts of the first aqueous solution. Morepreferably the composition is made by mixing about 45-65 parts of thefirst aqueous solution with 35 to 65 parts of the emulsion. Mostpreferred is where 58 parts of the first aqueous solution is mixed with42 parts of the emulsion. The emulsion and first aqueous solution aremixed well and poured into the desired containers, preferably at atemperature of about 55 to 70° C.

The method of the invention provides an antiperspirant or deodorantstick which exhibits improved long term stability.

The invention will be further described in connection with the followingexamples which are set forth for the purposes of illustration only.

EXAMPLE 1

A single phase clear gel antiperspirant composition was made accordingto the following formula:

    ______________________________________                                                              w/w %                                                   ______________________________________                                        Aluminum zirconium tetrachlorohydrex gly                                                              60.00                                                 (35% aqueous solution)                                                        Butylene glycol         20.00                                                 Water                   20.00                                                 Seakem LB Agarose        1.00                                                 ______________________________________                                    

The composition was made by adding all of the ingredients together andmixing well. The mixture was heated to 80° C. and then cooled andallowed to gel.

EXAMPLE 2

A single phase clear antiperspirant composition was made according tothe following formula:

    ______________________________________                                                              w/w %                                                   ______________________________________                                        Aluminum zirconium tetrachlorohydrex gly                                                              60                                                    (35% aqueous solution)                                                        Seakem LE Agarose       1.0                                                   Water                   QS                                                    ______________________________________                                    

The ingredients were mixed together and heated to 80° C. with stirringto mix well. The composition was allowed to cool and formed atranslucent gel having a gel strength of about 500 grams/cm².

EXAMPLE 3

Oil in water emulsion antiperspirant compositions were made according tothe following formulas:

    __________________________________________________________________________                   w/w %                                                                         1  2  3  4  5  6  7  8  9                                      __________________________________________________________________________    Agarose        1.00                                                                             1.20                                                                             1.00                                                                             2.00                                                                             1.00                                                                             1.00                                                                             4.00                                                                             1.00                                                                             1.00                                   Al/Zr tetrachlorohydrexGLY PG                                                                -- -- -- -- -- -- 75.00                                                                            -- --                                     (30% propylene glycol soln)                                                   Al/Zr tetrachlorohydrexGly (43%)                                                             -- -- -- -- 58.00                                                                            58.00                                                                            -- 58.00                                                                            58.00                                  Al/ZrtetrachlorohydrexGly (35%)                                                              68.00                                                                            68.00                                                                            68.00                                                                            68.00                                                                            -- -- -- -- --                                     Water          31.00                                                                            27.80                                                                            -- 18.00                                                                            21.00                                                                            29.00                                                                            -- 12.00                                                                            14.00                                  Propylene glycol                                                                             -- 10.00                                                                            15.00                                                                            -- -- -- -- -- --                                     Ethanol        -- -- 5.00                                                                             -- -- -- -- -- --                                     Dimethicone copolyol                                                                         -- -- -- 2.00                                                                             -- -- -- -- --                                     Dipropylene glycol                                                                           -- -- -- 10.00                                                                            10.00                                                                            10.00                                                                            -- -- --                                     PEG/PPG-17/6 Copolymer                                                                       -- -- -- -- 2.00                                                                             -- -- -- --                                     polyalkylene glycol                                                           Water soluble fragrance                                                                      -- -- -- -- 0.30                                                                             -- -- -- --                                     Benzethonium chloride                                                                        -- -- -- -- 0.10                                                                             -- -- -- --                                     Dimethyl isosorbide                                                                          -- -- -- -- -- 2.00                                                                             -- -- --                                     Methyl propane diol                                                                          -- -- -- -- -- -- 21.00                                                                            15.00                                                                            10.00                                  Cyclomethicone/dimethicone                                                                   -- -- -- -- -- -- -- 8.00                                                                             --                                     copolyol                                                                      Dimethicone    -- -- -- -- -- -- -- 6.00                                                                             15.00                                  Polyoxyethylene (20) sorbitan          2.00                                   monolaurate                                                                   __________________________________________________________________________

The formula 1-7 compositions were made by combining the ingredients andmixing well. The mixtures were heated to a temperature where thepolysaccharide solution became clear, and the mixture stirred well. Themixtures were then cooled to room temperature to form a gel.

The Formula 8 composition was made by mixing the antiperspirant salt,agarose, and water and heating the mixture to 80° C. with stirring.Separately, the cyclomethicone/dimethicone copolyol and dimethicone weremixed well. The antiperspirant salt, agarose, and water mixture wascooled to 40° C. and added slowly with turbulent mixing to thecyclomethicone/dimethicone copolyol and dimethicone mixture to form anemulsion of the aqueous phase polysaccharide mixture in the oil phasemixture. The resulting composition was a clear gel water in oilemulsion.

The Formula 9 composition was made by mixing the antiperspirant salt,agarose, polyoxyethylene (20) sorbitan monolaurate, and water andheating to 80° C. with stirring. The mixture was then cooled to 40° C.The dimethicone was added slowly with vigorous mixing to the water phasemixture to form an oil in water emulsion. The resulting Formula 9composition was a clear gel oil in water emulsion.

EXAMPLE 4

Antiperspirant stick compositions having opacity were prepared accordingto the following formulas:

    ______________________________________                                                           w/w%                                                                          1    2      3      4                                       ______________________________________                                        Dimethicone copolyol 2.00   4.00   --   --                                    Cyclomethicone and dimethicone crosspoly-                                                          2.00   --     --   --                                    mer                                                                           Dipropylene glycol   9.00   10.00  8.00 7.00                                  12-hydroxystearic acid                                                                             5.00   5.00   5.00 5.00                                  Al/Zr tetrachlorohydrex gly                                                                        58.00  58.00  58.00                                                                              58.00                                 (43% aqueous sol.)                                                            Acetamide MEA (70% aqueous sol.)                                                                   1.00   1.00   1.00 1.00                                  Agarose              1.00   1.00   1.00 1.00                                  Water                QS     QS     QS   QS                                    Dipropylene glycol dibenzoate                                                                      --     --     6.00 --                                    Isosteareth-2        --     --     --   5.50                                  Phenyl trimethicone  --     --     --   0.5                                   ______________________________________                                    

The compositions were made by mixing the agarose, dipropylene glycol,and water and heating the mixture to 100 to 105° C. with stirring untilthe composition was clear with no particulates remaining. The mixturewas then cooled to 85 to 90° C. and the 12-hydroxystearic acid added.When all the material was completely melted and the mixture was uniform,then the temperature was reduced to 70 to 75° C. Separately, thesilicones, organic surfactants, other ingredients were combined andmixed well and added to the cooled mixture. The acetamide MEA and/ordipropylene glycol dibenzoate was then added to the mixture, which wasthen maintained at a temperature of 60 to 75° C. The aqueousantiperspirant salt solution was heated to a temperature of 50 to 65° C.and combined with the emulsion mixture with stirring. The resultingcompositions were maintained at a temperature of 55 to 70° C. and pouredinto stick molds to provide opaque gel oil-in-water emulsions whichhardened into solid sticks.

While the invention has been described in connection with the preferredembodiment, it is not intended to limit the scope of the invention tothe particular form set forth, but, on the contrary, it is intended tocover such alternatives, modifications and equivalents as may beincluded within the spirit and scope of the invention as defined by theappended claims.

We claim:
 1. A single phase aqueous gel composition comprising, byweight of the total compostion:0.05-50% of a polysaccharide gellantselected from the group consisting of galactan, galactomannan,glucomannan, polyuronic acid, heteropolysaccharide, and mixturesthereof, and 1-30% of an antiperspirant active ingredient solubilized inthe aqueous single phase.
 2. The composition of claim 1 wherein thepolysaccharide gellant has a molecular weight of about 10,000 to1,500,000 daltons.
 3. The composition of claim 1 wherein thepolysaccharide gellant is selected from the group consisting ofgalactan, galactomannan, and mixtures thereof.
 4. The composition ofclaim 3 wherein the polysaccharide gellant is a galactan.
 5. Thecomposition of claim 4 wherein the polysaccharide gellant is agar,agarose, carageenan, or mixtures thereof.
 6. The composition of claim 5wherein the polysaccharide gellant is agarose.
 7. The composition ofclaim 1 wherein the antiperspirant salt is an inorganic or organic saltof a metal selected from the group consisting of aluminum, zirconium,and zinc.
 8. The composition of claim 1 comprising 1-90% by weight ofthe total composition of water.
 9. The composition of claim 1 furthercomprising 0.1-20% of a gel structure modifier.
 10. The composition ofclaim 9 wherein the gel structure modifier is selected from the groupconsisting of monomeric ether, polymeric ether, monohydric alcohol,dihydric alcohol, organosiloxane emulsifier, and mixtures thereof. 11.The composition of claim 10 wherein the gel structure modifier is aC₂₋₁₀ monohydric alcohol, a dihydric alcohol of the formula R(OH)_(n)wherein n is 2 and R is a C₂₋₁₀ unsubstituted or substituted alkyl,where the substituent is hydroxyl or methyl.
 12. The composition ofclaim 10 wherein the gel structure modifier is selected from the groupconsisting of monohydric alcohol, dihydric alcohol, and mixturesthereof.